✨ Best Answer ✨
0<12-x≦x は 0<12-x かつ 12-x ≦ x
0<12-x ⇔ x<12 ...①
12-x ≦ x ⇔ 12≦ 2x ⇔ 6≦ x ...②
①,②より
6≦x<12
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✨ Best Answer ✨
0<12-x≦x は 0<12-x かつ 12-x ≦ x
0<12-x ⇔ x<12 ...①
12-x ≦ x ⇔ 12≦ 2x ⇔ 6≦ x ...②
①,②より
6≦x<12
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are also looking at these questions 😉
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